TW201313929A - Coated articles and method for making the same - Google Patents

Abstract

A coated article is provided which includes a substrate, a anodic oxide film deposited on the substrate, a bonding layer deposited on the anodic oxide film and a vacuum coating layer deposited on the anodic oxide film. The bonding layer is Ti layer or Cr layer. The vacuum coating layer is silicon dioxide layer or aluminium oxide layer. The coated article present a bumpy and high level of brightness appearance. Method for making the coated article is also provided.

Description

Coating member and manufacturing method thereof

The invention relates to a coated member and a method of manufacturing the same.

Conventional technology, anodizing treatment is used to form an anodized film on the surface of aluminum or aluminum alloy, which can improve the hardness, wear resistance, corrosion resistance and decoration of aluminum or aluminum alloy matrix to some extent, but anodizing The film has the disadvantage of being rough and dull.

Spraying a transparent paint layer on the anodized film can improve the touch of the surface of the anodized product; however, the paint process, the thickness of the paint layer are uneven, and the thickness of the coating formed by spraying is easy to occur during the spraying process. Thicker, this will result in a deviation in the color of the anodized film and a decrease in gloss. In addition, the spraying process is prone to environmental pollution. The vacuum coating method is used instead of spraying to form a transparent vacuum coating layer to solve the above technical problem. However, due to the large internal stress between the anodized film and the vacuum coating layer, cracking and peeling of the film layer are likely to occur.

In view of this, the present invention provides a coated member that can solve the above problems.

Further, the present invention provides a method of manufacturing the above-mentioned coated member.

A coated member comprises a substrate, an anodized film sequentially formed on the substrate, a bonding layer and a vacuum coating layer, wherein the bonding layer is a titanium layer or a chromium layer, and the vacuum coating layer is a ceria layer or an aluminum oxide layer.

A method of manufacturing a coated member, comprising the steps of:

Providing a substrate;

Forming an anodized film on the surface of the substrate by anodizing;

Polishing the surface of the anodized film;

Using a vacuum coating method, using a titanium target or a chromium target as a target, forming a bonding layer on the polished anodized film, the bonding layer being a titanium layer or a chromium layer;

The vacuum coating method is adopted, and a vacuum target layer is formed on the bonding layer by using a ruthenium target or an aluminum target as a target and oxygen as a reaction gas, and the vacuum coating layer is a ruthenium dioxide layer or an aluminum oxide layer.

In the present invention, the anodized film is polished, and the bonding layer and the vacuum coating layer are both colorless and transparent, so that the coated member exhibits high gloss while exhibiting an anodized appearance. The formation of the bonding layer can improve the bonding force between the vacuum coating layer and the anodized film, thereby avoiding the phenomenon that the vacuum coating layer is cracked and peeled off by directly bonding the anodized film and the vacuum coating layer. The vacuum coating layer itself has good hardness and wear resistance, and can enhance the hardness and wear resistance of the coated member. In addition, the method of manufacturing the coated member is environmentally friendly and has a good yield.

Referring to FIG. 1, a coated member 10 according to a preferred embodiment of the present invention includes a substrate 11, an anodized film 13 sequentially formed on the substrate 11, a bonding layer 15, and a vacuum coating layer 17. The coating member 10 can be an electronic device casing, and can also be a watch case, a metal bathroom piece, a building part, and an automobile part.

The material of the base 11 may be aluminum, aluminum alloy, magnesium, magnesium alloy or other metal that can be anodized.

A plurality of protrusions 131 are formed on the surface of the anodized film 13.

The bonding layer 15 serves to increase the bonding force between the anodized film 13 and the subsequent film layer. The bonding layer 15 is a titanium (Ti) layer or a chromium (Cr) layer. The bonding layer 15 has a thickness of 15 to 40 nm.

The vacuum coating layer 17 is used to improve the hardness and wear resistance of the coated member 10. The vacuum coating layer 17 is a cerium oxide (SiO ₂ ) layer or an aluminum oxide (Al ₂ O ₃ ) layer. The vacuum plating layer 17 has a thickness of 1 to 1.8 μm.

The bonding layer 15 and the vacuum coating layer 17 are both colorless and transparent. Both the bonding layer 15 and the vacuum plating layer 17 are formed by vacuum plating such as magnetron sputtering or vacuum evaporation.

The manufacturing method of the coated member 10 of the present invention comprises the following steps:

A substrate 11 is provided. The material of the substrate 11 may be aluminum, aluminum alloy, magnesium, magnesium alloy or other metal that can be anodized.

The substrate 11 is pretreated. The pretreatment includes steps of wiping the surface of the substrate 11 with deionized water and absolute ethanol, and ultrasonically cleaning the substrate 11 with an acetone solution.

An anodized film 13 is formed on the surface of the substrate 11 by anodizing, and the anodized film 13 is subjected to conventional dyeing and sealing treatment. A plurality of protrusions 131 are formed on the surface of the anodized film 13. The anodizing treatment is carried out under the following conditions: an aqueous solution containing 180-220 g/L of sulfuric acid as the electrolyte, the temperature of the electrolyte is 19-21 ° C, the anodizing time is 20-40 min, and the current density is 1-1.5 A/ m ² .

The substrate 11 subjected to the above treatment is subjected to a polishing treatment to improve the glossiness of the surface of the anodized film 13, and to improve the disadvantage of the conventional anodized film being dull. A polishing machine (not shown) is provided, the polishing machine comprising a cloth wheel, a suspension aqueous solution containing alumina powder is coated on the cloth wheel, and the surface of the anodized film 13 is polished and polished. The time is 30~50min. It can be understood that the polishing slurry composition, polishing time and other parameters can be adjusted according to actual production needs.

Referring to FIG. 2, a vacuum coater 100 is provided. The vacuum coater 100 includes a coating chamber 20 and a vacuum pump 30 connected to the coating chamber 20. The vacuum pump 30 is used to evacuate the coating chamber 20. The coating chamber 20 is provided with a turret (not shown), two first targets 22 opposed to each other, and two second targets 23 disposed opposite each other. The turret drives the base body 11 to revolve along a circular trajectory 21, and the base body 11 also rotates when revolving along the trajectory 21. A gas source passage 24 is disposed at each end of each of the first target 22 and each of the second targets 23, and the gas enters the coating chamber 20 through the gas source passage 24. Wherein, the first target 22 is a titanium target or a chromium target; and the second target 23 is a tantalum target or an aluminum target.

A bonding layer 15 is sputtered on the anodized film 13 by magnetron sputtering. The bonding layer 15 is a titanium layer or chromium. Sputtering the bonding layer 15 is performed in the vacuum coater 100. The first target 22 is turned on, and the power of the first target 22 is set to 6 to 15 kW; and the flow rate of the argon gas is adjusted to be 100 to 300 sccm using argon as a working gas. During sputtering, a bias voltage of -100 to -300 V is applied to the substrate 11, and the coating chamber 20 is heated to a temperature of 10 to 200 ° C (ie, a coating temperature of 10 to 200 ° C), and the coating time is 5 to 10 minutes.

A vacuum coating layer 17 is sputtered on the bonding layer 15 by magnetron sputtering. The vacuum coating layer 17 is a ceria layer or an aluminum oxide layer. The second target 23 is turned on, and the power of the second target 23 is set to 6~15kw; the flow rate of the oxygen is adjusted to 50~200sccm by using oxygen as the reaction gas, and the flow rate of the argon gas is adjusted by using argon gas as the working gas. ~300sccm. During sputtering, a bias voltage of -100 to -300 V is applied to the substrate 11, and the coating chamber 20 is heated to a temperature of 20 to 200 ° C (ie, a coating temperature of 20 to 200 ° C), and the coating time is 30 to 40 minutes.

In the present invention, the anodized film 13 is polished, and the bonding layer 15 and the vacuum coating layer 17 are both colorless and transparent, so that the coated member 10 exhibits a high gloss while exhibiting an anodized appearance. degree. The formation of the bonding layer 15 can improve the bonding force between the vacuum coating layer 17 and the anodized film 13, thereby preventing the anodized film 13 from directly bonding with the vacuum coating layer 17 to cause cracking of the vacuum coating layer 17, Peeling and other phenomena. The vacuum coating layer 17 itself has good hardness and wear resistance, and can enhance the hardness and wear resistance of the coated member 10. Further, the method of manufacturing the coated member 10 is environmentally friendly and has a good yield.

10. . . Coated parts

11. . . Matrix

13. . . Anodized film

131. . . Bulge

15. . . Bonding layer

17. . . Vacuum coating

100. . . Coating machine

20. . . Coating chamber

30. . . Vacuum pump

twenty one. . . Trajectory

twenty two. . . First target

twenty three. . . Second target

twenty four. . . Air source channel

1 is a cross-sectional view showing a coated member of a preferred embodiment of the present invention;

2 is a schematic view of a vacuum coater according to a preferred embodiment of the present invention.

10. . . Coated parts

11. . . Matrix

13. . . Anodized film

131. . . Bulge

15. . . Bonding layer

17. . . Vacuum coating

Claims (10)

A coating member comprising a substrate and an anodized film formed on the surface of the substrate, wherein the coating member further comprises a bonding layer and a vacuum coating layer sequentially formed on the surface of the anodized film, wherein the bonding layer is a titanium layer or A chromium layer, the vacuum coating layer being a ceria layer or an aluminum oxide layer. The coated article of claim 1, wherein the bonding layer is formed by vacuum coating. The coated article according to claim 1, wherein the bonding layer has a thickness of 15 to 40 nm. The coated article according to claim 1, wherein the vacuum coating layer has a thickness of 1 to 1.8 μm. The coated article of claim 1, wherein the bonding layer is colorless and transparent. The coated article of claim 1, wherein the vacuum coating layer is colorless and transparent. A method of manufacturing a coated member, comprising the steps of:
Providing a substrate;
Forming an anodized film on the surface of the substrate by anodizing;
Polishing the surface of the anodized film;
Using a vacuum coating method, using a titanium target or a chromium target as a target, forming a bonding layer on the polished anodized film, the bonding layer being a titanium layer or a chromium layer;
The vacuum coating method is adopted, and a vacuum target layer is formed on the bonding layer by using a ruthenium target or an aluminum target as a target and oxygen as a reaction gas, and the vacuum coating layer is a ruthenium dioxide layer or an aluminum oxide layer. The method for manufacturing a coated member according to claim 7, wherein the method for forming the bonding layer is: using a magnetron sputtering coating method, setting a power of a titanium target or a chromium target to 6 to 15 kW, using argon gas For the working gas, the flow rate of argon gas is 100~300sccm, the bias voltage applied to the substrate is -100~-300V, the coating temperature is 10~200°C, and the coating time is 5~10min. The method for manufacturing a coated member according to claim 7, wherein the method for forming the bonding layer is: using a magnetron sputtering coating method, the power of the target or the aluminum target is set to 6 to 15 kW, and oxygen is used. The reaction gas, the flow rate of adjusting oxygen is 50~200sccm, the working gas of argon gas is used, the flow rate of argon gas is 100~300sccm, the bias voltage applied to the substrate is -100~-300V, the coating temperature is 10~200 °C, coating The time is 30~40min. The method of manufacturing a coated member according to claim 7, wherein the polishing process is: using a polishing machine comprising a cloth wheel to coat a suspension aqueous solution containing alumina powder. On the cloth wheel, the surface of the anodized film is polished, and the polishing time is 30 to 50 minutes.